创建int数组的字符串数组时出现问题

Question

I need to create an array of integers contained within an array of words. I keep getting an error

cannot convert from int[] to java.lang.String[]

where it says

private String[][] expenseName = {clothes, tuition, transportation, food, housing, books};

This is my code

public class Budget{

///////////////fields////////////////


int expenseAmount[] = {1000, 2000, 3000, 4000, 5000, 6000};
int monthNumber[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};


int clothes[]= {100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210};
int tuition[] = {200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200, 200};
int transportation[]={100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210};
int food[]={80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80};
int housing[]={150, 150, 150, 150, 150, 150, 150, 150, 150, 150, 150};
int books[]= {200, 0, 0, 0, 0, 0, 0, 300, 0, 0, 0, 0};
int i=0; // this is arbitrary. Never hard code numbers unless that number is never going to change. in that case you make a variable and define it.
int month_num;
private String[][] expenseName = {clothes, tuition, transportation, food, housing, books};

/////////constructors///////////////
public Budget() {}

public Budget(int name) {this.expenseName[i][i] = name;}

public Budget(String name, int clothes, int tuition, int transportation, int food, int housing, int books)
{
this.expenseName[i] = name;
this.clothes[i] = clothes;
this.tuition[i] = tuition;
this.transportation[i] = transportation;
this.food[i] = food;
this.housing[i] = housing;
this.books[i] = books;
this.monthNumber[i] = month_num;
}


/////////////methods///////////
public String getexpenseName() {return expenseName[i][i];}

public int getclothes() {return clothes[i];}//change the I
public int gettuition() {return tuition[i];}
public int gettransporation() {return transportation[i];}
public int getfood() {return food[i];}
public int gethousing() {return housing[i];}
public int books() {return books[i];}
public int getmonthNumber() {return monthNumber[i];}//change the i

public void setExpenseName(String name)
{
this.expenseName[i][i] = name;
}

public boolean setexpenseAmount(int num)
{
if (this.expenseAmount[i] == 0)
{this.expenseAmount[i] = num;
return true;
}
else
return false;

Answer 1

You need quotes around your strings:

private String[] expenseName = {"clothes", "tuition", "etc"};

or you need to declare it int[][]

private int[][] expenseName = {clothes, tuition};

Answer 2

正如错误消息明确指出的那样，你不能将int[]放入String[]的数组中。

Answer 3

Change

private String[][] expenseName = {clothes, tuition, transportation, food, housing, books};

to

private int[][] expenseName = {clothes, tuition, transportation, food, housing, books};

Answer 4

In Java, you cannot use an array of int as an array of String.

That will just not work, like the error says.

I guess that you must be familiar with some language where there is no type checking and you can do whatever you want. But this is Java.

Answer 5

You have to convert the int[] to String[] , for example like this.

public class ArrayIntToString {
public static void main(String[] args) {
    int[] numbers = { 1, 2, 3 };
    String[] numbersAsStrings = new String[numbers.length];
    int i = 0;
    for (Integer number : numbers) {
        numbersAsStrings[i++] = number.toString();
    }
}
}